Conjunction Event Detail

    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    4.563988E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T15:57:20+0800
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    1 Object 1

    Name USA 55
    AOE ID 20547
    NORAD ID 20547
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 48568
    NORAD ID 48568
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 55 STARLINK-2217
    Time of Closest Approach 2026-09-05T15:18:52+0000
    Collision Probability (Pc) 4.563988E-5
    Conjunction Distance (km) 0.855 km
    Relative Speed (km/s) 14.624 km/s
    Conjunction Risk Parameters R (Radial): -0.063 | I (In-track): 0.246 | C (Cross-track): 0.817
    Collision Risk Index (CRI) 0.68
    X Position (km) -6768.166 -6768.356
    Position Y (km) -1040.694 -1039.913
    Position Z (km) 156.92 156.629
    Velocity X (km/s) 0.098 0.549
    Velocity Y (km/s) 0.565 -4.544
    Velocity Z (km/s) 7.588 -6.106

    Orbital Parameters 国际轨道数据源

    Parameter USA 55 STARLINK-2217
    Semimajor Axis (a) 6809.878 km 6848.830 km
    Eccentricity (e) 0.005380 0.000095
    Inclination (i) 94.0953° 53.1594°
    RAAN 187.8476° 20.1996°
    Perigee Argument 187.5790° 72.5061°
    Mean Anomaly (M) 172.4659° 287.6044°
    Apogee 468.379 km 471.342 km
    Perigee 395.103 km 470.044 km
    Orbit Epoch 2026-09-03T21:20:04+0000 2026-09-03T09:17:47+0000

    USA 55 & STARLINK-2217 Collision Probability (Pc) Trend

    USA 55 & STARLINK-2217 Collision Probability (Pc) TrendNot Available

    USA 55 & STARLINK-2217 Miss Distance (Miss Distance) Trend

    USA 55 & STARLINK-2217 Miss Distance (Miss Distance) TrendNot Available

    USA 55Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-2217Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 55Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-2217Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 55

    No nearby objects data